I’m not surprised when I hear about various creams, pills and potions being revealed as frauds instead of the weight-loss wonders they’re pitched as. But I’d never even heard of “caffeine-infused” clothing when authorities labeled it recently as another gimmick marketed to slim you down.

The Federal Trade Commission announced Monday it had reached tentative settlements with two companies that marketed such garments as being able to slim your hips and thighs and reduce cellulite.

“Caffeine-infused shapewear is the latest ‘weight-loss’ brew concocted by marketers,” Jessica Rich, the FTC’s consumer protection director, said in a statement. “If someone says you can lose weight by wearing the clothes they are selling, steer clear. The best approach is tried and true: diet and exercise.”

The agency alleged Norm Thompson Outfitters and Wacoal America did not back up their claims with scientific evidence. In settling the cases, the companies did not admit nor deny the allegations.

The settlements prohibit the companies from making false and unsubstantiated claims about their shapewear and require them to pay a total of more than $1.5 million for consumer refunds.

The settlements are pending a public comment period that ends Oct. 29.